These 10 facts about space will blow your mind. A correspondence course is an academic class that is taken â and taught â across some geographical distance. The original correspondence courses were carried out through the postal service. Professors would mail assignments and lecture notes to students, who would return essays and projects for grading.
A voluntary muscle, often called a skeletal muscle, is one of three types of muscle in the body. Most voluntary muscles are used to move bones, though some, such as the muscles in the face, are used to create movements below the skin. Unlike cardiac or smooth muscle, these muscles can be controlled by the conscious mind.
Skeletal, the muscle type attaching to bones can be consciously controlled and therefore is a voluntary type. The three muscle types we will view are then: Skeletal-voluntary muscles attached to skeletal elements and cartilage. Cardiac-involuntary muscles making up the myocardium of the heart.his is a high magnification view of a striated muscle type ! Remember, cardiac and skeletal are striated types! Muscle types are also described as voluntary or involuntary. These terms imply some muscles are controlled voluntarily while others are not.